Add 5 skills from LFM + 12 skills total

New skills:
- blacknode-graph-workflow
- multi-agent-workflow-execution
- langgraph-agent-workflow
- langgraph-multi-agent-router
- three-tier-evaluation-pipeline

Config: LLM pipeline uses LFM on llama.cpp (8080)

config/settings.yaml

@@ -16,10 +16,10 @@ llm:
   api_key: ""
   max_tokens: 8000
 
-# Secondary LLM for pipeline tasks — uses Ollama on 3060 (non-reasoning model)
+# Secondary LLM for pipeline tasks — uses LFM on 3060 (llama.cpp)
 llm_pipeline:
-  base_url: http://100.64.0.4:11434
-  model: qwen2.5:7b
+  base_url: http://100.64.0.4:8080
+  model: C:\models\LFM2.5-2.6B-Q4_K_M.gguf
   api_key: ""
   max_tokens: 6000